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katedriscoll

Natural Sciences - TOK 2022: THEORY OF KNOWLEDGE WEBSITE FOR THE IBDP - 1 views

  • Each discipline within the natural sciences aims to produce knowledge about different aspects of the natural world. In this sense, each discipline within the natural sciences will tweak its methodology somewhat to fit its particular purpose and scope. Nevertheless, all disciplines within the natural sciences will broadly have a shared underlying scope, methodology and purpose.
  • You arguably trusted your teachers and believed that what they told you in science class was true. But under which circumstances should we accept second hand scientific knowledge? The motto of Britain's very first scientific society  (The Royal Society)  is "Nullius in Verba", which means "Take nobody's word for it".  One of the key features of the natural sciences is the necessity of being able to prove what you claim. Good science does not only require proof. It also actively invites peer-review and even falsification. For example, if your teacher claims that starch will turn blue when mixed with iodine, you will want to test this yourself. Within the natural sciences, you should be able to repeat experiments to see if a hypothesis is correct. But what should you conclude when an experiment 'does not work'? If this happens in you science lesson, you may have made a mistake.
katherineharron

Screen time: Mental health menace or scapegoat? - CNN - 0 views

  • (CNN)"Have smartphones destroyed a generation?" Jean Twenge, a professor of psychology at San Diego State University, asked in an adapted excerpt of her controversial book, "iGen."In the book, she argues that those born after 1995 are on the "brink of a mental-health crisis" -- and she believes it can be linked to growing up with their noses pressed against a screen.
  • For those who responded 10 to 19 hours per week, that number was about 18%. For those who spent 40 or more hours a week using social media, that number approached 24%.
  • By the twelfth grade, however, the negative correlations between screen time and teen psychology had somewhat dissipated. In addition, less is not always more: Teens with zero hours of screen time had higher rates of unhappiness than their peers who logged in a few hours a week.
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  • Twenge recognizes that her study shows only a correlation between screen use and "psychological well-being," which is measured using survey questions about self-esteem, life satisfaction and happiness. The surveys can't say whether screen time directly changes teens' mental health, the research states.
  • "I spent my career in technology. I wasn't prepared for its effect on my kids," philanthropist Melinda Gates, whose three children were also born after 1995, wrote August in the Washington Post. "Phones and apps aren't good or bad by themselves, but for adolescents who don't yet have the emotional tools to navigate life's complications and confusions, they can exacerbate the difficulties of growing up."
  • At the same time, she said, kids are learning on their devices and connecting in novel ways. "Marginalized groups such as gay and lesbian students (are) finding support they never had before through social networks," said Gates.
  • Other studies have explored the connection between social media and isolation and how "likes" activate the brain's reward center. Some analyses have found that moderate use of these technologies is "not intrinsically harmful" and can even improve social skills and develop resilience.
katherineharron

Did '13 Reasons Why' lead to a spike in adolescent suicides? Researchers are divided - CNN - 0 views

  • When Netflix debuted "13 Reasons Why" in 2017, some mental health experts argued the show was "dangerous" for its depiction of teen suicide.
  • Research Director Daniel Romer of the Annenberg Public Policy Center at the University of Pennsylvania reanalyzed the data while adjusting for the broader increase in suicide between 2013 and 2017. His study was published in PLOS One, a peer-reviewed journal published by the Public Library of Science.
  • "When you have a jump in suicides starting in March and going into April, it's hard to say it's because of the show," he said.Meanwhile, for 10- to 17-year-old girls, Romer said there was a small increase, though so small, that it's not actually statistically significant. It could have been because of the show, but because the jump isn't statistically significant, they can't say for sure, he said.
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  • "13 Reasons Why" is based on bestselling author Jay Asher's 2007 young adult book of the same title, following the story of a teenage girl who leaves behind 13 audio recordings on cassette tapes before killing herself. Each tape is addressed to a person who she says played a role in her decision to die.
Javier E

Opinion | How Behavioral Economics Took Over America - The New York Times - 0 views

  • Some behavioral interventions do seem to lead to positive changes, such as automatically enrolling children in school free lunch programs or simplifying mortgage information for aspiring homeowners. (Whether one might call such interventions “nudges,” however, is debatable.)
  • it’s not clear we need to appeal to psychology studies to make some common-sense changes, especially since the scientific rigor of these studies is shaky at best.
  • Nudges are related to a larger area of research on “priming,” which tests how behavior changes in response to what we think about or even see without noticing
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  • Behavioral economics is at the center of the so-called replication crisis, a euphemism for the uncomfortable fact that the results of a significant percentage of social science experiments can’t be reproduced in subsequent trials
  • this key result was not replicated in similar experiments, undermining confidence in a whole area of study. It’s obvious that we do associate old age and slower walking, and we probably do slow down sometimes when thinking about older people. It’s just not clear that that’s a law of the mind.
  • And these attempts to “correct” human behavior are based on tenuous science. The replication crisis doesn’t have a simple solution
  • Journals have instituted reforms like having scientists preregister their hypotheses to avoid the possibility of results being manipulated during the research. But that doesn’t change how many uncertain results are already out there, with a knock-on effect that ripples through huge segments of quantitative social scienc
  • The Johns Hopkins science historian Ruth Leys, author of a forthcoming book on priming research, points out that cognitive science is especially prone to building future studies off disputed results. Despite the replication crisis, these fields are a “train on wheels, the track is laid and almost nothing stops them,” Dr. Leys said.
  • These cases result from lax standards around data collection, which will hopefully be corrected. But they also result from strong financial incentives: the possibility of salaries, book deals and speaking and consulting fees that range into the millions. Researchers can get those prizes only if they can show “significant” findings.
  • It is no coincidence that behavioral economics, from Dr. Kahneman to today, tends to be pro-business. Science should be not just reproducible, but also free of obvious ideology.
  • Technology and modern data science have only further entrenched behavioral economics. Its findings have greatly influenced algorithm design.
  • The collection of personal data about our movements, purchases and preferences inform interventions in our behavior from the grocery store to who is arrested by the police.
  • Setting people up for safety and success and providing good default options isn’t bad in itself, but there are more sinister uses as well. After all, not everyone who wants to exploit your cognitive biases has your best interests at heart.
  • Despite all its flaws, behavioral economics continues to drive public policy, market research and the design of digital interfaces.
  • One might think that a kind of moratorium on applying such dubious science would be in order — except that enacting one would be practically impossible. These ideas are so embedded in our institutions and everyday life that a full-scale audit of the behavioral sciences would require bringing much of our society to a standstill.
  • There is no peer review for algorithms that determine entry to a stadium or access to credit. To perform even the most banal, everyday actions, you have to put implicit trust in unverified scientific results.
  • We can’t afford to defer questions about human nature, and the social and political policies that come from them, to commercialized “research” that is scientifically questionable and driven by ideology. Behavioral economics claims that humans aren’t rational.
  • That’s a philosophical claim, not a scientific one, and it should be fought out in a rigorous marketplace of ideas. Instead of unearthing real, valuable knowledge of human nature, behavioral economics gives us “one weird trick” to lose weight or quit smoking.
  • Humans may not be perfectly rational, but we can do better than the predictably irrational consequences that behavioral economics has left us with today.
Javier E

The Constitution of Knowledge - Persuasion - 0 views

  • But ideas in the marketplace do not talk directly to each other, and for the most part neither do individuals.
  • It is a good metaphor as far as it goes, yet woefully incomplete. It conjures up an image of ideas being traded by individuals in a kind of flea market, or of disembodied ideas clashing and competing in some ethereal realm of their own
  • When Americans think about how we find truth amid a world full of discordant viewpoints, we usually turn to a metaphor, that of the marketplace of ideas
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  • Rather, our conversations are mediated through institutions like journals and newspapers and social-media platforms. They rely on a dense network of norms and rules, like truthfulness and fact-checking. They depend on the expertise of professionals, like peer reviewers and editors. The entire system rests on a foundation of values: a shared understanding that there are right and wrong ways to make knowledge.
  • Those values and rules and institutions do for knowledge what the U.S. Constitution does for politics: They create a governing structure, forcing social contestation onto peaceful and productive pathways.
  • I call them, collectively, the Constitution of Knowledge. If we want to defend that system from its many persistent attackers, we need to understand it—and its very special notion of reality.
  • What reality really is
  • The question “What is reality?” may seem either too metaphysical to answer meaningfully or too obvious to need answering
  • The whole problem is that humans have no direct access to an objective world independent of our minds and senses, and subjective certainty is no guarantee of truth. Faced with those problems and others, philosophers and practitioners think of reality as a set of propositions (or claims, or statements) that have been validated in some way, and that have thereby been shown to be at least conditionally true—true, that is, unless debunked
  • Some propositions reflect reality as we perceive it in everyday life (“The sky is blue”). Others, like the equations on a quantum physicist’s blackboard, are incomprehensible to intuition. Many fall somewhere in between.
  • a phrase I used a few sentences ago, “validated in some way,” hides a cheat. In epistemology, the whole question is, validated in what way? If we care about knowledge, freedom, and peace, then we need to stake a strong claim: Anyone can believe anything, but liberal science—open-ended, depersonalized checking by an error-seeking social network—is the only legitimate validator of knowledge, at least in the reality-based community.
  • That is a very bold, very broad, very tough claim, and it goes down very badly with lots of people and communities who feel ignored or oppressed by the Constitution of Knowledge: creationists, Christian Scientists, homeopaths, astrologists, flat-earthers, anti-vaxxers, birthers, 9/11 truthers, postmodern professors, political partisans, QAnon followers, and adherents of any number of other belief systems and religions.
  • But, like the U.S. Constitution’s claim to exclusivity in governing (“unconstitutional” means “illegal,” period), the Constitution of Knowledge’s claim to exclusivity is its sine qua non.
  • Rules for reality
  • The specific proposition does not matter. What does matter is that the only way to validate it is to submit it to the reality-based community. Otherwise, you could win dominance for your proposition by, say, brute force, threatening and jailing and torturing and killing those who see things differently—a standard method down through history
  • Say you believe something (X) to be true, and you believe that its acceptance as true by others is important or at least warranted
  • Or you and your like-minded friends could go off and talk only to each other, in which case you would have founded a cult—which is lawful but socially divisive and epistemically worthless.
  • Or you could engage in a social-media campaign to shame and intimidate those who disagree with you—a very common method these days, but one that stifles debate and throttles knowledge (and harms a lot of people).
  • What the reality-based community does is something else again. Its distinctive qualities derive from two core rules: 
  • what counts is the way the rule directs us to behave: You must assume your own and everyone else’s fallibility and you must hunt for your own and others’ errors, even if you are confident you are right. Otherwise, you are not reality-based.
  • The fallibilist rule: No one gets the final say. You may claim that a statement is established as knowledge only if it can be debunked, in principle, and only insofar as it withstands attempts to debunk it.
  • The empirical rule: No one has personal authority. You may claim that a statement has been established as knowledge only insofar as the method used to check it gives the same result regardless of the identity of the checker, and regardless of the source of the statement
  • Who you are does not count; the rules apply to everybody and persons are interchangeable. If your method is valid only for you or your affinity group or people who believe as you do, then you are not reality-based.
  • Whatever you do to check a proposition must be something that anyone can do, at least in principle, and get the same result. Also, no one proposing a hypothesis gets a free pass simply because of who she is or what group she belongs to.
  • Both rules have very profound social implications. “No final say” insists that to be knowledge, a statement must be checked; and it also says that knowledge is always provisional, standing only as long as it withstands checking.
  • “No personal authority” adds a crucial second step by defining what properly counts as checking. The point, as the great American philosopher Charles Sanders Peirce emphasized more than a century ago, is not that I look or you look but that we look; and then we compare, contest, and justify our views. Critically, then, the empirical rule is a social principle that forces us into the same conversation—a requirement that all of us, however different our viewpoints, agree to discuss what is in principle only one reality.
  • By extension, the empirical rule also dictates what does not count as checking: claims to authority by dint of a personally or tribally privileged perspective.
  • In principle, persons and groups are interchangeable. If I claim access to divine revelation, or if I claim the support of miracles that only believers can witness, or if I claim that my class or race or historically dominant status or historically oppressed status allows me to know and say things that others cannot, then I am breaking the empirical rule by exempting my views from contestability by others.
  • Though seemingly simple, the two rules define a style of social learning that prohibits a lot of the rhetorical moves we see every day.
  • Claiming that a conversation is too dangerous or blasphemous or oppressive or traumatizing to tolerate will almost always break the fallibilist rule.
  • Claims which begin “as a Jew,” or “as a queer,” or for that matter “as minister of information” or “as Pope” or “as head of the Supreme Soviet,” can be valid if they provide useful information about context or credentials; but if they claim to settle an argument by appealing to personal or tribal authority, rather than earned authority, they violate the empirical rule. 
  • “No personal authority” says nothing against trying to understand where people are coming from. If we are debating same-sex marriage, I may mention my experience as a gay person, and my experience may (I hope) be relevant.
  • But statements about personal standing and interest inform the conversation; they do not control it, dominate it, or end it. The rule acknowledges, and to an extent accepts, that people’s social positions and histories matter; but it asks its adherents not to burrow into their social identities, and not to play them as rhetorical trump cards, but to bring them to the larger project of knowledge-building and thereby transcend them.
  • the fallibilist and empirical rules are the common basis of science, journalism, law, and all the other branches of today’s reality-based community. For that reason, both rules also attract hostility, defiance, interference, and open warfare from those who would rather manipulate truth than advance it.
Javier E

I Thought I Was Saving Trans Kids. Now I'm Blowing the Whistle. - 0 views

  • Soon after my arrival at the Transgender Center, I was struck by the lack of formal protocols for treatment. The center’s physician co-directors were essentially the sole authority.
  • At first, the patient population was tipped toward what used to be the “traditional” instance of a child with gender dysphoria: a boy, often quite young, who wanted to present as—who wanted to be—a girl. 
  • Until 2015 or so, a very small number of these boys comprised the population of pediatric gender dysphoria cases. Then, across the Western world, there began to be a dramatic increase in a new population: Teenage girls, many with no previous history of gender distress, suddenly declared they were transgender and demanded immediate treatment with testosterone. 
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  • The girls who came to us had many comorbidities: depression, anxiety, ADHD, eating disorders, obesity. Many were diagnosed with autism, or had autism-like symptoms. A report last year on a British pediatric transgender center found that about one-third of the patients referred there were on the autism spectrum.
  • This concerned me, but didn’t feel I was in the position to sound some kind of alarm back then. There was a team of about eight of us, and only one other person brought up the kinds of questions I had. Anyone who raised doubts ran the risk of being called a transphobe. 
  • I certainly saw this at the center. One of my jobs was to do intake for new patients and their families. When I started there were probably 10 such calls a month. When I left there were 50, and about 70 percent of the new patients were girls. Sometimes clusters of girls arrived from the same high school. 
  • There are no reliable studies showing this. Indeed, the experiences of many of the center’s patients prove how false these assertions are. 
  • The doctors privately recognized these false self-diagnoses as a manifestation of social contagion. They even acknowledged that suicide has an element of social contagion. But when I said the clusters of girls streaming into our service looked as if their gender issues might be a manifestation of social contagion, the doctors said gender identity reflected something innate.
  • To begin transitioning, the girls needed a letter of support from a therapist—usually one we recommended—who they had to see only once or twice for the green light. To make it more efficient for the therapists, we offered them a template for how to write a letter in support of transition. The next stop was a single visit to the endocrinologist for a testosterone prescription. 
  • When a female takes testosterone, the profound and permanent effects of the hormone can be seen in a matter of months. Voices drop, beards sprout, body fat is redistributed. Sexual interest explodes, aggression increases, and mood can be unpredictable. Our patients were told about some side effects, including sterility. But after working at the center, I came to believe that teenagers are simply not capable of fully grasping what it means to make the decision to become infertile while still a minor.
  • Many encounters with patients emphasized to me how little these young people understood the profound impacts changing gender would have on their bodies and minds. But the center downplayed the negative consequences, and emphasized the need for transition. As the center’s website said, “Left untreated, gender dysphoria has any number of consequences, from self-harm to suicide. But when you take away the gender dysphoria by allowing a child to be who he or she is, we’re noticing that goes away. The studies we have show these kids often wind up functioning psychosocially as well as or better than their peers.” 
  • Frequently, our patients declared they had disorders that no one believed they had. We had patients who said they had Tourette syndrome (but they didn’t); that they had tic disorders (but they didn’t); that they had multiple personalities (but they didn’t).
  • Here’s an example. On Friday, May 1, 2020, a colleague emailed me about a 15-year-old male patient: “Oh dear. I am concerned that [the patient] does not understand what Bicalutamide does.” I responded: “I don’t think that we start anything honestly right now.”
  • Bicalutamide is a medication used to treat metastatic prostate cancer, and one of its side effects is that it feminizes the bodies of men who take it, including the appearance of breasts. The center prescribed this cancer drug as a puberty blocker and feminizing agent for boys. As with most cancer drugs, bicalutamide has a long list of side effects, and this patient experienced one of them: liver toxicity. He was sent to another unit of the hospital for evaluation and immediately taken off the drug. Afterward, his mother sent an electronic message to the Transgender Center saying that we were lucky her family was not the type to sue.
  • How little patients understood what they were getting into was illustrated by a call we received at the center in 2020 from a 17-year-old biological female patient who was on testosterone. She said she was bleeding from the vagina. In less than an hour she had soaked through an extra heavy pad, her jeans, and a towel she had wrapped around her waist. The nurse at the center told her to go to the emergency room right away.
  • when there was a dispute between the parents, it seemed the center always took the side of the affirming parent.
  • Other girls were disturbed by the effects of testosterone on their clitoris, which enlarges and grows into what looks like a microphallus, or a tiny penis. I counseled one patient whose enlarged clitoris now extended below her vulva, and it chafed and rubbed painfully in her jeans. I advised her to get the kind of compression undergarments worn by biological men who dress to pass as female. At the end of the call I thought to myself, “Wow, we hurt this kid.”
  • There are rare conditions in which babies are born with atypical genitalia—cases that call for sophisticated care and compassion. But clinics like the one where I worked are creating a whole cohort of kids with atypical genitals—and most of these teens haven’t even had sex yet. They had no idea who they were going to be as adults. Yet all it took for them to permanently transform themselves was one or two short conversations with a therapist.
  • Being put on powerful doses of testosterone or estrogen—enough to try to trick your body into mimicking the opposite sex—-affects the rest of the body. I doubt that any parent who's ever consented to give their kid testosterone (a lifelong treatment) knows that they’re also possibly signing their kid up for blood pressure medication, cholesterol medication, and perhaps sleep apnea and diabetes. 
  • Besides teenage girls, another new group was referred to us: young people from the inpatient psychiatric unit, or the emergency department, of St. Louis Children’s Hospital. The mental health of these kids was deeply concerning—there were diagnoses like schizophrenia, PTSD, bipolar disorder, and more. Often they were already on a fistful of pharmaceuticals.
  • no matter how much suffering or pain a child had endured, or how little treatment and love they had received, our doctors viewed gender transition—even with all the expense and hardship it entailed—as the solution.
  • Another disturbing aspect of the center was its lack of regard for the rights of parents—and the extent to which doctors saw themselves as more informed decision-makers over the fate of these children.
  • We found out later this girl had had intercourse, and because testosterone thins the vaginal tissues, her vaginal canal had ripped open. She had to be sedated and given surgery to repair the damage. She wasn’t the only vaginal laceration case we heard about.
  • During the four years I worked at the clinic as a case manager—I was responsible for patient intake and oversight—around a thousand distressed young people came through our doors. The majority of them received hormone prescriptions that can have life-altering consequences—including sterility. 
  • I left the clinic in November of last year because I could no longer participate in what was happening there. By the time I departed, I was certain that the way the American medical system is treating these patients is the opposite of the promise we make to “do no harm.” Instead, we are permanently harming the vulnerable patients in our care.
  • Today I am speaking out. I am doing so knowing how toxic the public conversation is around this highly contentious issue—and the ways that my testimony might be misused. I am doing so knowing that I am putting myself at serious personal and professional risk.
  • Almost everyone in my life advised me to keep my head down. But I cannot in good conscience do so. Because what is happening to scores of children is far more important than my comfort. And what is happening to them is morally and medically appalling.
  • For almost four years, I worked at The Washington University School of Medicine Division of Infectious Diseases with teens and young adults who were HIV positive. Many of them were trans or otherwise gender nonconforming, and I could relate: Through childhood and adolescence, I did a lot of gender questioning myself. I’m now married to a transman, and together we are raising my two biological children from a previous marriage and three foster children we hope to adopt. 
  • The center’s working assumption was that the earlier you treat kids with gender dysphoria, the more anguish you can prevent later on. This premise was shared by the center’s doctors and therapists. Given their expertise, I assumed that abundant evidence backed this consensus. 
  • All that led me to a job in 2018 as a case manager at The Washington University Transgender Center at St. Louis Children's Hospital, which had been established a year earlier. 
Javier E

Opinion | Lower fertility rates are the new cultural norm - The Washington Post - 0 views

  • The percentage who say that having children is very important to them has dropped from 43 percent to 30 percent since 2019. This fits with data showing that, since 2007, the total fertility rate in the United States has fallen from 2.1 lifetime births per woman, the “replacement rate” necessary to sustain population levels, to just 1.64 in 2020.
  • The U.S. economy is losing an edge that robust population dynamics gave it relative to low-birth-rate peer nations in Japan and Western Europe; this country, too, faces chronic labor-supply constraints as well as an even less favorable “dependency ratio” between workers and retirees than it already expected.
  • the timing and the magnitude of such a demographic sea-change cry out for explanation. What happened in 2007?
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  • New financial constraints on family formation are a potential cause, as implied by another striking finding in the Journal poll — 78 percent of adults lack confidence this generation of children will enjoy a better life than they do.
  • Yet a recent analysis for the Aspen Economic Strategy Group by Melissa S. Kearney and Phillip B. Levine, economics professors at the University of Maryland and Wellesley College, respectively, determined that “beyond the temporary effects of the Great Recession, no recent economic or policy change is responsible for a meaningful share of the decline in the US fertility rate since 2007.”
  • Their study took account of such factors as the high cost of child care, student debt service and housing as well as Medicaid coverage and the wider availability of long-acting reversible contraception. Yet they had “no success finding evidence” that any of these were decisive.
  • Kearney and Levine speculated instead that the answers lie in the cultural zeitgeist — “shifting priorities across cohorts of young adults,”
  • A possibility worth considering, they suggested, is that young adults who experienced “intensive parenting” as children now balk at the heavy investment of time and resources needed to raise their own kids that way: It would clash with their career and leisure goals.
  • another event that year: Apple released the first iPhone, a revolutionary cultural moment if there ever was one. The ensuing smartphone-enabled social media boom — Facebook had opened membership to anyone older than 13 in 2006 — forever changed how human beings relate with one another.
  • We are just beginning to understand this development’s effect on mental health, education, religious observance, community cohesion — everything. Why wouldn’t it also affect people’s willingness to have children?
  • one indirect way new media affect childbearing rates is through “time competition effects” — essentially, hours spent watching the tube cannot be spent forming romantic partnerships.
  • a 2021 review of survey data on young adults and adolescents in the United States and other countries, the years between 2009 and 2018 saw a marked decline in reported sexual activity.
  • the authors hypothesized that people are distracted from the search for partners by “increasing use of computer games and social media.
  • during the late 20th century, Brazil’s fertility rates fell after women who watched soap operas depicting smaller families sought to emulate them by having fewer children themselves.
  • This may be an area where incentives do not influence behavior, at least not enough. Whether the cultural shift to lower birthrates occurs on an accelerated basis, as in the United States after 2007, or gradually, as it did in Japan, it appears permanent — “sticky,” as policy wonks say.
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